ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals

Topic Options
Rate This Topic
#206674 - 07/30/12 08:41 PM RV outlets
schenimann Offline
Member
Registered: 02/18/08
Posts: 193
Loc: Western North Carolina
Our church is wanting to put in some 50 and 30amp outlets for RVs. We have singing groups that bring their large busses and need a hookup so they don't have to run their gens for 2-3 days.

The panels are 208/120 and I need 120/240. Can I use the 208v to operate these outlets or do I need to change it to 240. I understand that many 240v motors have run on 208 for years. What's the best thing to do?
Top
Work Gear for Electricians and the Trades
#206676 - 07/31/12 12:57 AM Re: RV outlets [Re: schenimann]
Tesla Offline
Member
Registered: 06/16/04
Posts: 1273
Loc: Sacramento, CA
Don't sweat nothing.

The VAST bulk of the true loads are 120VAC...

Only a fraction of the RV load uses two poles: air conditioning in the larger sizes.

So...

Hook up 208Y120 as if it were 240/120 and all will be well.

( No RV uses electric power for hot water at 240VAC, nor do any use electric ranges, etc. )

_________________________
Tesla
Top
#206683 - 07/31/12 02:06 PM Re: RV outlets [Re: schenimann]
gfretwell Offline


Member
Registered: 07/20/04
Posts: 9039
Loc: Estero,Fl,usa
Heating elements are not a concern anyway. They just heat less.
The AC units are the heavy hitter in an RV.

Maybe a peek at a few RV manufacturer specs would answer the question.
_________________________
Greg Fretwell
Top
#206687 - 07/31/12 02:23 PM Re: RV outlets [Re: schenimann]
EV607797 Offline
Member
Registered: 10/25/06
Posts: 744
Loc: Fredericksburg, VA, USA
I can say with certainty that I've been to many RV parks that use 120/208 Wye services and distribute from there. I really don't think you'll have any trouble at all.

My friend has a motor coach RV that has an electric cooktop in it that only uses a 120 volt circuit, as does the washer/dryer combo. I'm with Tesla: You probably won't see many 240 volt loads, if at all in an RV.
_________________________
---Ed---

"But the guy at Home Depot said it would work."
Top
#206694 - 07/31/12 09:23 PM Re: RV outlets [Re: schenimann]
WESTUPLACE Offline
Member
Registered: 03/29/04
Posts: 251
Loc: Kingwood, TX USA
I have worked on lots of RVs Most all but the very largest (and most expensive) use 120v for everything just divided across 2 ckts a very few use dryers that are 240v and fewer use 240V AC units. Most all rooftop AC units are 120v. I see no problem using 120/208.
Top
#206887 - 08/24/12 04:50 PM Re: RV outlets [Re: schenimann]
sabrown Offline
Member
Registered: 12/12/02
Posts: 302
Loc: Ogden, Utah, USA
If you have a handbook look at 2011 NEC 551.40(A). It basically says that equipment be rated 208-230 to allow for 208Y/120 distribution.

Shane
Top

Member Spotlight
Member Since: 05/03/03
Posts: 1137
New in the Gallery:
SE cable question
Featured:

2017 NEC and Related
2017 NEC
Now Available!

Shout Box


Who's Online
0 registered (), 93 Guests and 9 Spiders online.
Key: Admin, Global Mod, Mod
 
New in the Gallery:
SE cable question
 
Top Posters (30 Days)
Admin 47
HotLine1 43
gfretwell 19
Ruben Rocha 12
Trumpy 9
 
Newest Members
KrmtFrg, Stack, Scotto, Freecrowder, clee512

ECN Electrical Forums - sponsored by Electrical Contractor Network - Electrical and Code Related Discussion for Electrical Contractors, Electricians, Inspectors, Instructors, Engineers and other related Professionals